A black author and poet from Denver, CO went undercover as an online white supremacist to try and understand where the trolls in the comment sections of his YouTube videos were coming from and why they all seemed to eerily parrot the same talking points about race and U.S. history.

More than 100 of the world's top robotics experts wrote a letter to the United Nations recently calling for a ban on the development of "killer robots" and warning of a new arms race. But are their fears really justified?

Donald Trump has defied expectation by pledging to increase the number of US troops in Afghanistan. In an address from Arlington, Virginia, the president announced that, following a review of the US strategy in Afghanistan, he had concluded that hasty withdrawal would be a mistake and that “our nation must seek an honourable and enduring outcome worthy of the tremendous sacrifices that have been made”.